The Mount of Apollo, also called the mount of the Sun, lies at the base of the ring finger, and the tradition claims for it artistry, taste, brilliance, success and the capacity to please; the ring finger itself is called the Apollo or Sun finger in this system. The reading follows the solar significations of the astrological tradition, splendour, art and public regard. It is worth noticing how the scheme is generated: four fingers, four planetary mounts beneath them, the thumb's ball as Venus, the outer edge as Luna, and Mars divided between the two remaining spaces, so that the seven classical bodies are distributed across the available surface. The completeness of the fit is a property of the design rather than a discovery.
Traditional chiromancy reads a well-developed Mount of Apollo, at the base of the ring finger, as indicating artistic sensibility, a love of beauty, and a capacity for brilliance or public recognition, associations drawn from Apollo's own role in classical mythology as god of music, poetry and the sun; the mount is accordingly sometimes called the Mount of the Sun rather than of Apollo specifically, reflecting the same solar association. An excessively developed Apollo mount is read in the tradition as vanity or a craving for attention without substance, while a flat one suggests indifference to art and to public life. The reading rests on the same borrowed planetary-character logic as the other mounts and has no independent evidential support.
Sources Introductiones apotelesmaticae elegantes in chyromantiam, physiognomiam, astrologiam naturalem, complexiones hominum, naturas planetarumJohannes ab Indagine (Johannes Rosenbach) with Les Mysteres de la MainAdolphe Desbarrolles